Scraper.



Patentes!` May' I, |900. f

F. THACHER.

PATENT einen;

FRANCIS THACHER, OF CHICAGO, ILLINOIS.

SCRAPER.

SPE(llI'ICATIOh'll forming paf't 0f Letters Patent No. 64`8,540, datedMay 1, 1900.

' Application fled July 20, 1899. Serial No, 724,462. (No modell) T0 all1072/0771/ it may concern:

Be it known that I, FRANCIS THACHER, of Chicago, in the county of Cookand State of Illinois, have invented certain new and useful Improvementsin Scrapers; and Ido hereby declare that the following is a full, clear,

and exact description thereof, reference be# ing had to the accompanyingdrawings, and to the letters of reference markedthereon, which form apart of this specification.

This invention relates to a novel device for scraping flat surfaces forthe purpose of smoothing or truingthe same.

The invention is'more especially designed for the use of butchers inscraping meatblocks, but is also adapted for other uses Where it may bedesired to provide means for scraping dat surfaces.

The invention consists in the matters hereinafter set forth and moreparticularly pointed out in the appended claims.

In the drawings, Figure l is a perspective View of a scraper made inaccordance with my invention. Fig. 2 is a bottom plan view thereof, andFig. Sis a cross-sectionv of the device, taken on line 3 3 of Fig. 2.

As shown in said drawings, A designates the blade of the scraper, and Bdesignates a handle-bar, which is attached to the upper margin of theblade and is provided with handles-or hand-grips b b, which extendoutside of the blade and afford means by which the device may be graspedby the hands when in use.

The blade Ais of novel form, the same being generally circular in formand provided at its lower margin with a circular scraping edge a. Saidscraping edge is located inline with the interior surface of the bladeland is formed by beveling the outer surface of the blade, near the loweredge thereof, atan angle to the inner and outer surface of the blade. Asherein shown, the beveled surface a' is disposed at an angle ofsubstantially fortyfive degrees to said inner and outer surfaces of theblade; but such angle maybe varied, as found most effective for thepurpose intended. Said annular blade is preferably made of flaring formand of greater diameter at the lower end than the upper end thereof. Aconvenient manner of making said annular blade consists in cutting froma steel tube a section of sufficient length to give the required depthto the blade and afterward expanding the lower end thereof over aconical mandrel to give the desired flaring shape toV the walls ot' theblade. The lower margin of the blade is afterward beveled, as indicatedat a', to provide the sharp scraping edge at the inner side of the saidlower margin of the blade.

The handle-bar B is herein shown as connected with the annular blade bymeans of two lugs C, which are attached to the interior face of theblade, on opposite sides of the center thereof, by means of rivets c orthe like and project upwardly beyond the upper margin of said blade. Theupper ends of said lugs extend through apertures in the handlebar B andare provided above said barwith screw-threaded portions which areengaged by nuts c.

When the device is to be used, the handle Z9 will be grasped by theoperatorand the blade pressed firmly against the surface to be scrapedand moved in contact with said surface toward the operator, or it may bemoved in the same manner from the operator, or it may be moved sidewise,or in any other direction. The scraping edge a of the blade preferablybeing made sharp throughout the entire circumference thereof, saiddevice will operate effectively when moved in any direction. The eectiveor scraping portion of the blade at any particular time when in use isthe rear portion thereof with respect to the direction of movement ofthe device. As before stated, the preferred form of the annular blade isone in which the walls are l made flaring, and with this constructionthe effective portion of the blade is inclined at the upper endforwardly or toward the direction of movement of the device, it beingfound that a scraper operates more effectively if maintained in suchforward inclination during the operation of scraping. Such inclinationof the inner surface of theblade might be obtained with a cylindricblade by beveling the inner surface thereof adjacent to its scrapingedge, yet an advantage is obtained by making the entire blade of conicalform, for the reason that when so constructed the scraping edge may besharpened by filing or grinding the outer or beveled surface of IOC 1Y@este the blade only, and even if a considerable part of the blade beremoved in so sharpenedge of the blade being continuous and being' heldin contact with the surface being scraped, the blade is .maintained atall times parallel with said surface, and therefore has notendency tocut more deeply into the surface at one place than another. In otherwords, the part of the blade which is located in front of the effectiveport-ion thereof with reference to the direction of movement of thedevice serves to hold 1 said effective portion of the s blade at thegeneral level of the surface which described, and sharpened by beingbeveled at both its inner and outer surfaces would be eifective for thepurpose and would tend to maintain the scraped surface fiat or level byreason of the scraping edgeof the blade being kept at all times parallelwith thel sur'- face being. scraped, yet such form of blade would beless desirable than that herein shown, for the reason that if all partsof the blade were adapted to afford an equal scrapingy action in movingin either direction that part of the edge in advance of the center ofthe blade would by reason of the resistance coming on the half of theblade in advance "of the handle tend by retarding the same to turnV orrotate the implement in the hand..V

The blade when beveled and adapted to act only in its part which is atthe rear of the center of the blade, (referring to its direction yofmotion of the implement when scraping,)

as described, operates smoothly and evenly and will produce and maintaina` flat surface without special care on the part of the operator.handles arranged as described when the scraper is drawn toward orpushed'from the operator it Will naturally bear equally against thesurface at both sides of the handles and excessive pressure on thescraper at the front or rear of the handle in a Way to scrape too deeplyinto the wood is not only unlikely to occur, but would be difficult to'accomplish.

The provision of the beveled surface a.' at the lower margin of theblade enables the same to be easily kept sharpened and also renders theaction of the blade more effective than if both sides of the blade werebeveled to produce the scraping edge.

It will be obvious that the blade need not constitu-te a complete circleand that it` need not always have the form of a true circle.V

Such modifications, therefore, as will produce the results above setforth are to be included Within the scope of the claims.v

I claim as my inventionl. A scraper, comprising an annular blade whichis .made of greater diameter atits lower than at its upper end and'isbeveled on its external surfaceadjacent to its lower margin to provide ascraping edge in line with the interior surface of the blade.

2. A scraper, comprising an annular blade provided at its lower marginwith a scraping edge, and a. handle-bar attached to the upper margin ofthe blade and projecting beyond said blade at either side thereof toform hanence of two witnesses, this 17th day of July,

FRANCIS THACHER.

Witnesses:

C. CLARENCE PooLE, C. W. HILLS.

It is to be especially noted that with

